<template>
  <view class="uni-date">
    <view :class="{'uni-date-editor--x__disabled': disabled,
		'uni-date-x--border': border}" class="uni-date-editor--x">
      <view v-if="!isRange" class="uni-date-x uni-date-single" @click="show">
        <view class="uni-date__icon-logo">
          <image :src="iconBase64" class="uni-date-editor--logo" mode=""></image>
        </view>
        <input v-model="singleVal" :disabled="true" :placeholder="placeholder" class="uni-date__input"
               type="text"/>
      </view>
      <view v-else class="uni-date-x uni-date-range" @click="show">
        <view class="uni-date__icon-logo">
          <image :src="iconBase64" class="uni-date-editor--logo" mode=""></image>
        </view>
        <input v-model="range.startDate" :disabled="true" :placeholder="startPlaceholder"
               class="uni-date__input uni-date-range__input" type="text"/>
        <slot>
          <view class="">{{ rangeSeparator }}</view>
        </slot>
        <input v-model="range.endDate" :disabled="true" :placeholder="endPlaceholder"
               class="uni-date__input uni-date-range__input" type="text"/>
      </view>
      <view v-show="!disabled && (singleVal || (range.startDate && range.endDate))" class="uni-date__icon-clear"
            @click="clear">
        <uni-icons color="#e1e1e1" size="14" type="clear"></uni-icons>
      </view>
    </view>

    <view v-show="popup" class="uni-date-mask" @click="close"></view>
    <view v-show="popup" ref="datePicker" class="uni-date-picker__container">
      <view v-if="!isRange" :style="popover" class="uni-date-single--x">
        <view v-show="hasTime" class="uni-date-changed popup-x-header">
          <input v-model="tempSingleDate" class="uni-date__input uni-date-range__input" placeholder="选择日期"
                 type="text"/>
          <time-picker v-model="time" :border="false" :disabled="!tempSingleDate" :end="reactEndTime"
                       :start="reactStartTime" type="time">
            <input v-model="time" :disabled="!tempSingleDate" class="uni-date__input uni-date-range__input"
                   placeholder="选择时间" type="text"/>
          </time-picker>
        </view>
        <calendar ref="pcSingle" :date="defSingleDate" :end-date="caleRange.endDate"
                  :showMonth="false" :start-date="caleRange.startDate" @change="singleChange"/>
        <view v-if="hasTime" class="popup-x-footer">
          <!-- <text class="">此刻</text> -->
          <text class="confirm" @click="confirmSingleChange">确定</text>
        </view>
        <view class="uni-date-popper__arrow"></view>
      </view>

      <view v-else :style="popover" class="uni-date-range--x">
        <view v-show="hasTime" class="popup-x-header uni-date-changed">
          <view class="popup-x-header--datetime">
            <input v-model="tempRange.startDate" class="uni-date__input uni-date-range__input" placeholder="开始日期"
                   type="text"/>
            <time-picker v-model="tempRange.startTime" :border="false" :disabled="!tempRange.startDate"
                         :start="reactStartTime"
                         type="time">
              <input v-model="tempRange.startTime" :disabled="!tempRange.startDate"
                     class="uni-date__input uni-date-range__input" placeholder="开始时间" type="text"/>
            </time-picker>
          </view>
          <uni-icons color="#999" style="line-height: 40px;" type="arrowthinright"></uni-icons>
          <view class="popup-x-header--datetime">
            <input v-model="tempRange.endDate" class="uni-date__input uni-date-range__input" placeholder="结束日期"
                   type="text"/>
            <time-picker v-model="tempRange.endTime" :border="false" :disabled="!tempRange.endDate" :end="reactEndTime"
                         type="time">
              <input v-model="tempRange.endTime" :disabled="!tempRange.endDate"
                     class="uni-date__input uni-date-range__input"
                     placeholder="结束时间" type="text"/>
            </time-picker>
          </view>
        </view>
        <view class="popup-x-body">
          <calendar ref="left" :end-date="caleRange.endDate" :pleStatus="endMultipleStatus"
                    :range="true" :showMonth="false" :start-date="caleRange.startDate" style="padding-right: 16px;"
                    @change="leftChange" @firstEnterCale="updateRightCale" @monthSwitch="leftMonthSwitch"/>
          <calendar ref="right" :end-date="caleRange.endDate" :pleStatus="startMultipleStatus"
                    :range="true" :showMonth="false" :start-date="caleRange.startDate"
                    style="padding-left: 16px;border-left: 1px solid #F1F1F1;" @change="rightChange"
                    @firstEnterCale="updateLeftCale" @monthSwitch="rightMonthSwitch"/>
        </view>
        <view v-if="hasTime" class="popup-x-footer">
          <text class="" @click="clear">清空</text>
          <text class="confirm" @click="confirmRangeChange">确定</text>
        </view>
      </view>
    </view>
    <calendar ref="mobile" :clearDate="false" :date="defSingleDate" :defTime="reactMobDefTime"
              :end-date="caleRange.endDate" :insert="false" :pleStatus="endMultipleStatus"
              :range="isRange" :selectableTimes="mobSelectableTime" :showMonth="false" :start-date="caleRange.startDate"
              :typeHasTime="hasTime"
              @confirm="mobileChange"/>
  </view>
</template>
<script>
import calendar from './calendar.vue'
import timePicker from './time-picker.vue'

/**
 * DatetimePicker 时间选择器
 * @description 同时支持 PC 和移动端使用日历选择日期和日期范围
 * @tutorial https://ext.dcloud.net.cn/plugin?id=3962
 * @property {String} type 选择器类型
 * @property {String|Array} value 绑定值
 * @property {String} placeholder 单选择时的占位内容
 * @property {String} start-placeholder 范围选择时开始日期的占位内容
 * @property {String} end-placeholder 范围选择时结束日期的占位内容
 * @property {String} range-separator 选择范围时的分隔符
 * @property {Boolean} border = [true|false] 是否有边框
 * @property {Boolean} disabled = [true|false] 是否禁用
 * @event {Function} change 确定日期时触发的事件
 **/

export default {
  name: 'UniDatetimePicker',
  components: {
    calendar,
    timePicker
  },
  data() {
    return {
      isRange: false,
      hasTime: false,
      mobileRange: false,
      // 单选
      singleVal: '',
      tempSingleDate: '',
      defSingleDate: '',
      time: '',
      // 范围选
      caleRange: {
        startDate: '',
        startTime: '',
        endDate: '',
        endTime: ''
      },
      range: {
        startDate: '',
        // startTime: '',
        endDate: '',
        // endTime: ''
      },
      tempRange: {
        startDate: '',
        startTime: '',
        endDate: '',
        endTime: ''
      },
      // 左右日历同步数据
      startMultipleStatus: {
        before: '',
        after: '',
        data: [],
        fulldate: ''
      },
      endMultipleStatus: {
        before: '',
        after: '',
        data: [],
        fulldate: ''
      },
      visible: false,
      popup: false,
      popover: null,
      iconBase64: ''
    }
  },
  props: {
    type: {
      type: String,
      default: 'datetime'
    },
    value: {
      type: [String, Number, Array],
      default: ''
    },
    start: {
      type: [Number, String],
      default: ''
    },
    end: {
      type: [Number, String],
      default: ''
    },
    returnType: {
      type: String,
      default: 'string'
    },
    placeholder: {
      type: String,
      default: '选择日期'
    },
    startPlaceholder: {
      type: String,
      default: '起始日期'
    },
    endPlaceholder: {
      type: String,
      default: '结束日期'
    },
    rangeSeparator: {
      type: String,
      default: '-'
    },
    border: {
      type: [Boolean],
      default: true
    },
    disabled: {
      type: [Boolean],
      default: false
    }
  },
  watch: {
    type: {
      immediate: true,
      handler(newVal, oldVal) {
        if (newVal.indexOf('time') !== -1) {
          this.hasTime = true
        }
        if (newVal.indexOf('range') !== -1) {
          this.isRange = true
        } else {
          this.isRange = false
        }
      }
    },
    value: {
      immediate: true,
      handler(newVal, oldVal) {
        if (!newVal) return
        if (!Array.isArray(newVal) && !this.isRange) {
          const {
            defDate,
            defTime
          } = this.parseDate(newVal)
          this.singleVal = defDate
          this.tempSingleDate = defDate
          this.defSingleDate = defDate
          if (this.hasTime) {
            this.singleVal = defDate + ' ' + defTime
            this.time = defTime
          }
        } else {
          if (oldVal) return // 只初始默认值
          const [before, after] = newVal
          if (!before && !after) return
          const defBefore = this.parseDate(before)
          const defAfter = this.parseDate(after)
          this.range.startDate = this.tempRange.startDate = defBefore.defDate
          this.range.endDate = this.tempRange.endDate = defAfter.defDate

          if (this.hasTime) {
            this.range.startDate = defBefore.defDate + ' ' + defBefore.defTime
            this.range.endDate = defAfter.defDate + ' ' + defAfter.defTime
            this.tempRange.startTime = defBefore.defTime
            this.tempRange.endTime = defAfter.defTime
          }
          const defaultRange = {
            before: defBefore.defDate,
            after: defAfter.defDate
          }
          this.startMultipleStatus = Object.assign({}, this.startMultipleStatus, defaultRange, {
            which: 'right'
          })
          this.endMultipleStatus = Object.assign({}, this.endMultipleStatus, defaultRange, {
            which: 'left'
          })
        }
      }
    },

    start: {
      immediate: true,
      handler(newVal, oldVal) {
        if (!newVal) return
        const {
          defDate,
          defTime
        } = this.parseDate(newVal)
        this.caleRange.startDate = defDate
        if (this.hasTime) {
          this.caleRange.startTime = defTime
        }
      }
    },

    end: {
      immediate: true,
      handler(newVal, oldVal) {
        if (!newVal) return
        const {
          defDate,
          defTime
        } = this.parseDate(newVal)
        this.caleRange.endDate = defDate
        if (this.hasTime) {
          this.caleRange.endTime = defTime
        }
      }
    },
  },
  computed: {
    reactStartTime() {
      const activeDate = this.isRange ? this.tempRange.startDate : this.tempSingleDate
      const res = activeDate === this.caleRange.startDate ? this.caleRange.startTime : ''
      return res
    },
    reactEndTime() {
      const activeDate = this.isRange ? this.tempRange.endDate : this.tempSingleDate
      const res = activeDate === this.caleRange.endDate ? this.caleRange.endTime : ''
      return res
    },
    reactMobDefTime() {
      return this.isRange ? {
        start: this.tempRange.startTime,
        end: this.tempRange.endTime
      } : this.time
    },
    mobSelectableTime() {
      return {
        start: this.caleRange.startTime,
        end: this.caleRange.endTime
      }
    }
  },
  mounted() {
    if (this.isRange) {
      if (!Array.isArray(this.value)) return
      const [before, after] = this.value
      if (before && after) return
      setTimeout(() => {
        this.$refs.right.next()
        this.$refs.right.cale.lastHover = false
      }, 20)
    }
  },
  methods: {
    updateLeftCale(e) {
      // console.log('----updateStartCale:', e);
      const left = this.$refs.left
      // 设置范围选
      left.cale.setHoverMultiple(e.after)
      left.setDate(this.$refs.left.nowDate.fullDate)
    },
    updateRightCale(e) {
      // console.log('----updateStartCale:', e);
      const right = this.$refs.right
      // 设置范围选
      right.cale.setHoverMultiple(e.after)
      right.setDate(this.$refs.right.nowDate.fullDate)
    },
    getRef() {
      this.$refs.left.pre()
    },
    show(event) {
      if (this.disabled) {
        return
      }
      const systemInfo = uni.getSystemInfoSync()
      if (systemInfo.windowWidth <= 500) {
        this.$refs.mobile.open()
        return
      }
      this.popover = {
        top: '10px'
      }
      // const dateEditor = uni.createSelectorQuery().in(this).select(".uni-date-editor--x")
      // dateEditor.boundingClientRect(rect => {
      // 	console.log(22222222, rect);
      // 	if (leftWindowInfo.errMsg) {
      // 		left = rect.left + 'px'
      // 	} else {
      // 		left = '15px'
      // 	}
      // 	this.popover = {
      // 		// top: rect.top + rect.height + 15 + 'px',
      // 		top: '40px',
      // 		left: 0,
      // 	}
      // }).exec()
      setTimeout(() => {
        this.popup = !this.popup
        // this.visible = true
      }, 20)
    },

    close() {
      setTimeout(() => {
        this.popup = false
        // this.visible = true
      }, 20)
    },
    setEmit(value) {
      if (this.returnType === "timestamp") {
        if (!Array.isArray(value)) {
          if (!this.hasTime) {
            value = value + ' ' + '00:00:00'
          }
          value = this.createTimestamp(value)
        } else {
          if (!this.hasTime) {
            value[0] = value[0] + ' ' + '00:00:00'
            value[1] = value[1] + ' ' + '00:00:00'
          }
          value[0] = this.createTimestamp(value[0])
          value[1] = this.createTimestamp(value[1])
        }
      }
      this.$emit('change', value)
      this.$emit('input', value)
    },
    createTimestamp(date) {
      date = this.fixIosDateFormat(date)
      return Date.parse(new Date(date))
    },
    singleChange(e) {
      this.tempSingleDate = e.fulldate
      if (this.hasTime) return
      this.confirmSingleChange()
    },

    confirmSingleChange() {
      if (!this.tempSingleDate) {
        this.popup = false
        return
      }
      if (this.hasTime) {
        this.singleVal = this.tempSingleDate + ' ' + (this.time ? this.time : '00:00:00')
      } else {
        this.singleVal = this.tempSingleDate
      }
      this.setEmit(this.singleVal)
      this.popup = false
    },

    leftChange(e) {
      const {
        before,
        after
      } = e.range
      this.rangeChange(before, after)
      const obj = {
        before: e.range.before,
        after: e.range.after,
        data: e.range.data,
        fulldate: e.fulldate
      }
      this.startMultipleStatus = Object.assign({}, this.startMultipleStatus, obj)
      // console.log('startMultipleStatus 返回:', this.startMultipleStatus)
    },

    rightChange(e) {
      const {
        before,
        after
      } = e.range
      this.rangeChange(before, after)
      const obj = {
        before: e.range.before,
        after: e.range.after,
        data: e.range.data,
        fulldate: e.fulldate
      }
      this.endMultipleStatus = Object.assign({}, this.endMultipleStatus, obj)
      // console.log('endMultipleStatus 返回:', this.endMultipleStatus)
    },

    mobileChange(e) {
      if (this.isRange) {
        const {
          before,
          after
        } = e.range
        this.handleStartAndEnd(before, after, true)
        if (this.hasTime) {
          const {
            startTime,
            endTime
          } = e.timeRange
          this.tempRange.startTime = startTime
          this.tempRange.endTime = endTime
        }
        this.confirmRangeChange()

      } else {
        if (this.hasTime) {
          this.singleVal = e.fulldate + ' ' + e.time
        } else {
          this.singleVal = e.fulldate
        }
        this.setEmit(this.singleVal)
      }
      this.$refs.mobile.close()
    },

    rangeChange(before, after) {
      if (!(before && after)) return
      this.handleStartAndEnd(before, after, true)
      if (this.hasTime) return
      this.confirmRangeChange()
    },

    confirmRangeChange() {
      if (!this.tempRange.startDate && !this.tempRange.endDate) {
        this.popup = false
        return
      }
      let start, end
      if (!this.hasTime) {
        start = this.range.startDate = this.tempRange.startDate
        end = this.range.endDate = this.tempRange.endDate
      } else {
        start = this.range.startDate = this.tempRange.startDate + ' ' +
            (this.tempRange.startTime ? this.tempRange.startTime : '00:00:00')
        end = this.range.endDate = this.tempRange.endDate + ' ' +
            (this.tempRange.endTime ? this.tempRange.endTime : '00:00:00')
      }
      const displayRange = [start, end]
      this.setEmit(displayRange)
      this.popup = false
    },

    handleStartAndEnd(before, after, temp = false) {
      if (!(before && after)) return
      const type = temp ? 'tempRange' : 'range'
      if (this.dateCompare(before, after)) {
        this[type].startDate = before
        this[type].endDate = after
      } else {
        this[type].startDate = after
        this[type].endDate = before
      }
    },

    /**
     * 比较时间大小
     */
    dateCompare(startDate, endDate) {
      // 计算截止时间
      startDate = new Date(startDate.replace('-', '/').replace('-', '/'))
      // 计算详细项的截止时间
      endDate = new Date(endDate.replace('-', '/').replace('-', '/'))
      if (startDate <= endDate) {
        return true
      } else {
        return false
      }
    },

    clear() {
      if (!this.isRange) {
        this.singleVal = ''
        this.$refs.pcSingle.calendar.fullDate = ''
        this.$refs.pcSingle.setDate()
        this.$emit('change', '')
        this.$emit('input', '')
      } else {
        this.range.startDate = ''
        this.range.endDate = ''
        this.tempRange = {}
        this.$refs.left.cale.multipleStatus.before = ''
        this.$refs.left.cale.multipleStatus.after = ''
        this.$refs.left.cale.multipleStatus.data = []
        this.$refs.left.cale.lastHover = false
        this.$refs.left.setDate()
        this.$refs.right.cale.multipleStatus.before = ''
        this.$refs.right.cale.multipleStatus.after = ''
        this.$refs.right.cale.multipleStatus.data = []
        this.$refs.right.cale.lastHover = false
        this.$refs.right.setDate()
        this.$refs.right.next()
        this.$emit('change', ['', ''])
        this.$emit('input', ['', ''])
      }
      // if (this.popup) this.popup = false
    },

    parseDate(date) {
      date = this.fixIosDateFormat(date)
      const defVal = new Date(date)
      const year = defVal.getFullYear()
      const month = defVal.getMonth() + 1
      const day = defVal.getDate()
      const hour = defVal.getHours()
      const minute = defVal.getMinutes()
      const second = defVal.getSeconds()
      const defDate = year + '-' + this.lessTen(month) + '-' + this.lessTen(day)
      const defTime = this.lessTen(hour) + ':' + this.lessTen(minute) + ':' + this.lessTen(second)
      return {
        defDate,
        defTime
      }
    },

    lessTen(item) {
      return item < 10 ? '0' + item : item
    },

    //兼容 iOS、safari 日期格式
    fixIosDateFormat(value) {
      if (typeof value === 'string') {
        value = value.replace(/-/g, '/')
      }
      return value
    },

    leftMonthSwitch(e) {
      // console.log('leftMonthSwitch 返回:', e)
    },
    rightMonthSwitch(e) {
      // console.log('rightMonthSwitch 返回:', e)
    }
  }
}
</script>

<style>
.uni-date-x {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border-radius: 4px;
  background-color: #fff;
  color: #666;
  font-size: 14px;
}

.uni-date-x--border {
  box-sizing: border-box;
  border-radius: 4px;
  border: 1px solid #dcdfe6;
}

.uni-date-editor--x {
  position: relative;
}

.uni-date-editor--x:hover .uni-date__icon-clear {
  position: absolute;
  top: 5px;
  right: 0;
  display: inline-block;
  box-sizing: border-box;
  border: 6px solid transparent;
  margin-right: 6px;
  /* #ifdef H5 */
  cursor: pointer;
  /* #endif */
}

.uni-date__icon-clear {
  display: none;
}

.uni-date__input {
  height: 40px;
  width: 100%;
  padding: 0 8px;
  line-height: 40px;
  font-size: 14px;
}

.uni-date-range__input {
  text-align: center;
}

.uni-date-picker__container {
  position: relative;
  /* 		position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  box-sizing: border-box;
  z-index: 996;
  font-size: 14px; */
}

.uni-date-mask {
  position: fixed;
  bottom: 0px;
  top: 0px;
  left: 0px;
  right: 0px;
  background-color: rgba(0, 0, 0, 0);
  transition-duration: 0.3s;
  z-index: 996;
}

.uni-date-single--x {
  /* padding: 0 8px; */
  position: absolute;
  top: 0;
  left: 0;
  z-index: 999;
  /* width: 375px; */
  border: 1px solid #e4e7ed;
  box-shadow: 0 2px 12px 0 rgb(0 0 0 / 10%);
  border-radius: 4px;
}

.uni-date-range--x {
  padding: 0 8px;
  background-color: #fff;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 999;
  /* width: 733px; */
  border: 1px solid #e4e7ed;
  box-shadow: 0 2px 12px 0 rgb(0 0 0 / 10%);
  border-radius: 4px;
}

.uni-date-editor--x__disabled {
  opacity: 0.4;
  cursor: default;
}

.uni-date-editor--logo {
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

/* 添加时间 */
.popup-x-header {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  /* justify-content: space-between; */
}

.popup-x-header--datetime {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  flex: 1;
}

.popup-x-body {
  display: flex;
}

.popup-x-footer {
  padding: 0 15px;
  border-top-color: #F1F1F1;
  border-top-style: solid;
  border-top-width: 1px;
  background-color: #fff;
  line-height: 40px;
  text-align: right;
  color: #666;
}

.popup-x-footer text:hover {
  color: #007aff;
  cursor: pointer;
  opacity: 0.8;
}

.popup-x-footer .confirm {
  margin-left: 20px;
  color: #007aff;
}

.uni-date-changed {
  background-color: #fff;
  text-align: center;
  color: #333;
  border-bottom-color: #F1F1F1;
  border-bottom-style: solid;
  border-bottom-width: 1px;
  /* padding: 0 50px; */
}

.uni-date-changed--time text {
  /* padding: 0 20px; */
  height: 50px;
  line-height: 50px;
}

.uni-date-changed .uni-date-changed--time {
  /* display: flex; */
  flex: 1;
}

.uni-date-changed--time-date {
  color: #333;
  opacity: 0.6;
}

/* .uni-date-popper__arrow {
    width: 10px;
    height: 10px;
    top: -6px;
    left: 35px;
    margin-right: 3px;
    border-top-width: 0;
    border-bottom-color: #ebeef5;
    border-width: 6px;
    filter: drop-shadow(0 2px 12px rgba(0,0,0,.03));
}
.uni-date-popper__arrow:after {
    content: " ";
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
} */

.mr-50 {
  margin-right: 50px;
}

</style>
